[lworld] RFR: 8349110: [lworld] Intrinsics for Unsafe.get/putFlatValue

[Tobias Hartmann]

On Fri, 6 Jun 2025 11:46:23 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

> Hi,
> 
> This PR implements intrinsics for `Unsafe::get/putFlatValue` and enables the corresponding tests in `TestIntrinsics`.
> 
> Please kindly review, thanks very much.

I also noticed that there are still two leftover ToDos from JDK-8239003 in TestIntrinsics. I think `test54` should be removed because C2 will bail out from compilation. I quickly checked and it also seems that we can re-enable the test with `-XX:+DeoptimizeALot` again.

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PR Comment: https://git.openjdk.org/valhalla/pull/1482#issuecomment-2966240167